##########################################################################
#
#  Copyright (c) 2016, Image Engine Design Inc. All rights reserved.
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#  modification, are permitted provided that the following conditions are
#  met:
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#      * Redistributions in binary form must reproduce the above
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##########################################################################

import os

import IECore

import GafferScene
import GafferSceneUI

if os.environ.get( "CYCLES_ROOT" ) :

	with IECore.IgnoredExceptions( ImportError ) :

		import GafferCycles

		def __cyclesRenderer() :

			result = GafferScene.InteractiveRender()
			result["renderer"].setValue( "Cycles" )
			return result

		GafferSceneUI.ShaderView.registerRenderer( "cycles", __cyclesRenderer )

		def __cyclesShaderBall() :

			result = GafferCycles.CyclesShaderBall()

			# Reserve some cores for the rest of the UI
			result["threads"]["enabled"].setValue( True )
			result["threads"]["value"].setValue( -3 )

			# Less issues when mixing around OSL shaders
			result["shadingSystem"]["enabled"].setValue( True )
			result["shadingSystem"]["value"].setValue( "OSL" )

			return result

		GafferSceneUI.ShaderView.registerScene( "cycles", "Default", __cyclesShaderBall )

		GafferSceneUI.ShaderView.registerRenderer( "osl", __cyclesRenderer )
		GafferSceneUI.ShaderView.registerScene( "osl", "Default", __cyclesShaderBall )

with IECore.IgnoredExceptions( ImportError ) :

	def __arnoldRenderer() :

		result = GafferScene.InteractiveRender()
		result["renderer"].setValue( "Arnold" )
		return result

	import GafferArnold
	GafferSceneUI.ShaderView.registerRenderer( "ai", __arnoldRenderer )

	def __arnoldShaderBall() :

		result = GafferArnold.ArnoldShaderBall()

		# Reserve some cores for the rest of the UI
		result["threads"]["enabled"].setValue( True )
		result["threads"]["value"].setValue( -3 )

		return result

	GafferSceneUI.ShaderView.registerScene( "ai", "Default", __arnoldShaderBall )

	# If Arnold is available, then we assume that the user would prefer
	# it over Cycles for OSL previews.
	GafferSceneUI.ShaderView.registerRenderer( "osl", __arnoldRenderer )
	GafferSceneUI.ShaderView.registerScene( "osl", "Default", __arnoldShaderBall )
